## Copyright (C) 2011 by Thomas Ernst
## 
## Permission is hereby granted, free of charge, to any person obtaining a copy
## of this software and associated documentation files (the "Software"), to deal
## in the Software without restriction, including without limitation the rights
## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
## copies of the Software, and to permit persons to whom the Software is
## furnished to do so, subject to the following conditions:
## 
## The above copyright notice and this permission notice shall be included in
## all copies or substantial portions of the Software.
## 
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
## THE SOFTWARE.

	
function calc_g1()
mlock(); global pa

	pa.g1=sparse(pa.Ng,pa.Ng);
	pa.g1_slice=zeros(pa.Ng,1);
	pa.g1_diag=zeros(pa.Ng,1);

	for k=1:pa.M, for q=1:pa.M
		pa.g1 = pa.g1 + pa.rho_kq(q+(k-1)*pa.M) * conj(pa.phi(:,k)) * pa.phi(:,q).';
	end, end
	pa.g1_slice = pa.g1(:,1);
	pa.g1_diag = diag(real(pa.g1));
